Effect of Several Reagents on Photocatalytic Decolorization of Methyl Orange in Bi2O3 Suspension Systems

2011 ◽  
Vol 399-401 ◽  
pp. 1443-1446
Author(s):  
Feng Chun Zeng ◽  
Jun Bo Zhong ◽  
Jun Zeng ◽  
Jian Zhang Li
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Photocatalytic Efficiency ◽  
Suspension Systems ◽  
Photocatalytic Decolorization ◽  
Decolorization Efficiency

The photocatalytic activity of Bi2O3 photocatalyst towards decolorization of Methyl Orange (MO) was studied by employing several reagents. The influence of H2O2 on the decolorization efficiency was investigated in detail. Addition of ions such as CO32−, Cl−, and SO42- inhibits the photocatalytic efficiency.

Low Temperature Solvolthermally Synthesized Nitrogen-Fluorine Doped TiO2 for Methyl Orange Photodegradation

2012 ◽  
Vol 488-489 ◽  
pp. 98-102
Author(s):  
Tanagorn Kwamman ◽  
Siwaporn Meejoo Smith
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Low Temperature ◽  
High Efficiency ◽  
Solvothermal Method ◽  
Visible Region ◽  
Titanium Isopropoxide ◽  
Decolorization Efficiency ◽  
Photocatalytic Applications

A low temperature solvothermal method was employed to synthesize nitrogen-fluorine doped TiO2 materials (N/F -TiO2) at various mole ratio of Ti:F; 10:1, 10:0.3 and 10:0.1, for photocatalytic applications. Doping fluorine and nitrogen in the TiO2 structure extend the spectra response of the materials toward a visible region resulting in the high efficiency to oxidize methyl orange (MO) under UV-Vis irradiation. The microstructure and photocatalytic activity of the materials appeared to depend on titanium precursors, titanium isopropoxide (TTIP) or tetrabutyl orthotitanate (TBOT), and the concentration of dopant (NH4F). The highest MO decolorization efficiency under UV-Vis irradiation for 30 minutes is about 86 % by using N-F-TiO2 (TTIP precursor) with Ti: F of 10: 3 as catalyst. The decolorization efficiencies of MO over N-F-TiO2 materials (TTIP precursor) are twice higher than that of the undoped catalyst.

scholarly journals Fabrication, Characterization and Photocatalytic Activity of Copper Oxide Nanowires Formed by Anodization of Copper Foams

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5030
Author(s):  
Alaa M. Abd-Elnaiem ◽  
M. A. Abdel-Rahim ◽  
A. Y. Abdel-Latief ◽  
Ahmed Abdel-Rahim Mohamed ◽  
Kristina Mojsilović ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Organic Compound ◽  
Organic Dye ◽  
Photocatalytic Efficiency ◽  
Voltage Range ◽  
Oxide Nanowires ◽  
Dye Decomposition ◽  
Photocatalytic Decolorization ◽  
Developed Surface

In recent paper anodization of copper foams in 0.1 M K2CO3 is reported. Anodization was performed in the voltage range of 5–25 V and in all the cases oxides with a developed surface area were obtained. However, anodizing only at 20 and 25 V resulted in the formation of nanostruc-tures. In all the cases, the products of anodizing consisted of crystalline phases like cuprite (Cu2O), tenorite (CuO), parameconite (Cu4O3) as well as spertiniite (Cu(OH)2). Copper foams after ano-dizing were applied as catalysts in the photocatalytic decolorization of a model organic compound such as methylene blue. The highest photocatalytic activity was observed for samples anodized at 25 V and closely followed by samples anodized at 5 V. The anodized copper foams proved to be a useful material in enhancing the photocatalytic efficiency of organic dye decomposition.

Photocatalytic Properties of Silver Oxide Loaded on Bismuth Vanadate

2013 ◽  
Vol 320 ◽  
pp. 654-660 ◽  
Author(s):  
Lian Wei Shan ◽  
Wei Li ◽  
Zhong Li ◽  
Jin Bo Mi ◽  
Da Sun ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Raw Materials ◽  
Sol Gel ◽  
Methyl Orange Solution ◽  
Photocatalytic Efficiency ◽  
Sintering Process ◽  
Calcination Time ◽  
Transmission Electron ◽  
Orange Solution

In order to enhance the photocatalytic activity of BiVO4, the Ag2O loaded on BiVO4is studied. In this study, Ag2O loaded on BiVO4was prepared with Bi(NO3)3, NH4VO3and C6H8O7as raw materials by sol-gel method. Influences of the sintering temperature and sintering time were studied on photocatalytic activity, crystal composition and molecular structure. The molecules of matter were characterized by FTIR. Both the phase transition in the sintering process and the influence of Ag2O loaded on crystal structure and size of the BiVO4powder were studied by XRD. The structure of the obtained samples were studied using transmission electron microscopy. The photocatalytic activity Ag2O loaded on BiVO4in different calcination time and different calcination temperature had been studied through the degradation methyl orange solution. It is found that the BiVO4photocatalytic efficiency of methyl orange is about 20% when the samples calcined for 4h and calcined at 500°C, the Ag2O loaded on BiVO4photocatalytic efficiency of methyl orange is doubled.

Kinetic Study on Photocatalytic Decolorization of Methyl Orange Aqueous Solution with KIO4 under UV Irradiation

2013 ◽  
Vol 838-841 ◽  
pp. 2413-2416
Author(s):  
Hua Fang ◽  
Wu Wei ◽  
Huang Zhun
Keyword(s):  
Methyl Orange ◽  
Uv Irradiation ◽  
Reaction System ◽  
Zero Order ◽  
Homogeneous Reaction ◽  
Optimal Amount ◽  
First Order ◽  
Photocatalytic Decolorization ◽  
Decolorization Efficiency ◽  
Kinetics Of

It has been generally agreed that methyl orange (MO) can be effectively decolorized in KIO4 homogeneous reaction system under UV irradiation. The knowledge on the kinetics of the system possesses both practical and theoretical values. Decolorization efficiency of MO increases as the loading of KIO4 increases and has no an optimal amount of KIO4 in this case. The decolorization reaction manifests the first order with lower concentration and the zero order with higher concentration. As the initial concentration goes up, the order of the reaction is reduced from 1 to 0.

SbVO4-TiO2 Cation Deficient Photocatalyst: Synthesis and Photocatalytic Investigation

2013 ◽  
Vol 702 ◽  
pp. 51-55
Author(s):  
Rahmatollah Rahimi ◽  
Masoumeh Mahjoub Moghaddas ◽  
Solmaz Zargari
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Vanadium Oxide ◽  
Visible Light Irradiation ◽  
Sol Gel ◽  
Photocatalytic Efficiency ◽  
Visible Light Driven ◽  
Ft Ir ◽  
First Time

For the first time antimony vanadium oxide-TiO2(SbV-T) nanocomposite was synthesized via sol-gel method to improve the photocatalytic efficiency of TiO2. The samples were characterized by FT-IR, XRD, SEM, EDX, and DRS. To investigate the photocatalytic activity of the samples, the photodegradation of methyl orange was carried out under visible light irradiation with pure TiO2, SbVO4, and SbVO4-TiO2nanocomposite. The SbV-T photocatalyst exhibited higher visible light driven photocatalytic efficiency to degrade MO dye. Furthermore the effect of SbVO4 and cationic vacancies in the photocatalytic activity of the SbV-T sample are described.

Photocatalytic Decolorization Performance of ZnO/SiO2

2012 ◽  
Vol 178-181 ◽  
pp. 649-652
Author(s):  
Yan Lu ◽  
Jun Bo Zhong ◽  
Jian Zhang Li ◽  
Wei Hu
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Sol Gel ◽  
Reflectance Spectroscopy ◽  
Surface Photovoltage ◽  
Gel Method ◽  
Surface Photovoltage Spectroscopy ◽  
Photocatalytic Decolorization

In this paprer, ZnO was loaded on SiO2 by sol-gel method. The prepared photocatalysts were characterized by BET, XRD, UV-Vis diffuse reflectance spectroscopy and surface photovoltage spectroscopy (SPS). The paper reveals that the photocatalytic activity of ZnO towards the decomposition of methyl orange can be greatly improved by loading ZnO on the surface of SiO2. 80% SiO2 possesses the best photocatalytic activity among the experimented compositions.

scholarly journals Photocatalytic Decolorization Study of Methyl Orange by TiO2–Chitosan Nanocomposites

2014 ◽  
Vol 14 (3) ◽  
pp. 209-218 ◽  
Author(s):  
Imelda Fajriati ◽  
Mudasir Mudasir ◽  
Endang Tri Wahyuni
Keyword(s):  
Particle Size ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Uv Light ◽  
Sol Gel ◽  
Ultra Violet ◽  
X Ray Diffraction ◽  
Solution Ph ◽  
Photocatalytic Decolorization ◽  
Structure Surface

The photocatalytic decolorization of methyl orange (MO) by TiO2-chitosan nanocomposite has been studied. This study was started by synthesizing TiO2-chitosan nanocomposites using sol-gel method with various concentrations of Titanium(IV) isopropoxide (TTIP) as the TiO2 precursor. The structure, surface morphology, thermal and optical property of TiO2-chitosan nanocomposite were characterized by X-ray diffraction (XRD), fourier transform infra red (FTIR) spectroscopy, scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and diffuse reflectance ultra violet (DRUV) spectroscopy. The photocatalytic activity of TiO2-chitosan nanocomposite was evaluated by photocatalytic decolorization of methyl orange as a model pollutant. The results indicate that the particle size of TiO2 increases with increasing ofthe concentration of TTIP, in which TiO2 with smallest particle size exhibit the highest photocatalytic activity. The highest photocatalytic decolorization was obtained at 5 h of contact time, initial concentration of MO at 20 ppm and at solution pH of 4. Using these conditions, over 90% of MO was able to be decolorized using 0.02 g of TiO2-chitosan nanocomposite under UV light irradiation. The TiO2-chitosan nanocomposite could be reused, which meant that the TiO2-chitosan nanocomposites can be developed as an effective and economical photocatalyst to decolorize or treat dye in wastewater.

Preparation of (Fe, Ni)-Codoped ZnO and Its Photocatalytic Activity for Deg-radation of Methyl Orange

2010 ◽  
Vol 31 (7) ◽  
pp. 797-802 ◽  
Author(s):  
Tianhua FU ◽  
Qianqian GAO ◽  
Fei LIU ◽  
Huajun DAI ◽  
Xingming KOU
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange
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